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1Published 2005“...U.S. Dept. of Energy, Energy Efficiency and Renewable Energy,...”
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2Published 1999“...U.S. Dept. of Energy, Office of Energy Efficiency and Renewable Energy,...”
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Government Document eBook -
3Published 2010“...[National Renewable Energy Laboratory, U.S. Dept. of Energy, Office of Energy Efficiency...”
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Government Document eBook